Model 4444 Special Function Contention/Broadcast DB9 A/OFFLINE/B Switch
■The PathWay® Model 4444 Special Function Broadcast/Contention DB9 A/OFFLINE/B Switch allows the user the capability of sharing a single DB9 interface device connected to the COMMON port among two other devices connected to the “A” and “B” ports. The Model 4444 is packaged in a slim desktop style enclosure.
■The front panel LED display indicates the switch position, and power status.
■The unit monitors data activity on ports A and B pin 3. If the unit detects data activity, the unit automatically switches to the port data was first detected on. The unit will then remain in the selected position, no longer monitoring data on A/B pin 3 and instead monitoring data over COMMON pin 2. Once that signal is not present for the time prescribed by the DSW1 settings, the unit will switch back to the idle disconnected OFFLINE position automatically.
●FEATURES:
■Pins 2 and 5 are connected among A, B and COM at all times.
■Pin 3 on Port A and Port B are monitored for activity.
■The unit automatically switches to the position, where data is detected.
■Pin 3 of the DB9 interface is switched via break-before- make electromechanical relays.
■The switch ports are transparent to all data.
■No Front panel Control.
■Front panel LED’s display the present position and power status.
■Pin 2 of the COM Port is monitored for the Broadcast Printer data activity.
■When Printer data activity is ended, the unit switches to the OFFLINE position and resumes monitoring Ports A and B for data activity.
■Unit chassis ground is connected to the signal ground.
■If power to the Model 4444 is lost, the switch will maintain its present position and continue to pass data.
■Upon power restore, the unit will return to the OFFLINE position and resume monitoring ports A and B for activity.
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Model 4444 、 4444 、 304444 |
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Special Function Contention/Broadcast DB9 A/OFFLINE/B Switch |
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Datasheet |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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2022/10/18 |
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Pub. 6316-02 |
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984 KB |
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